What is the standard of the wood surface? |
Item | Agrade | B grade | Cgrade D grade E grade |
Grain | Regular straight grain, mountain grain | Regular straight grain,mountaingrain,half straight grain | Straightgrain,mountaingrain, half straight grain | Straight grain,mountaingrain,messy grain | No limited |
Live knots | φ≤8mm,2pcs,color natural | φs15mm,2-5pcs,color natural | φ≤60mm,spitting,color closely Allowed,widths1/3width of flooring Allowed,width≤1/3width of flooring |
Dead knots | Not allowed | φs5mm,1-2pcs, spitting,color closely | φ≤20mm,1-3pcs,spitting,colorclosely φ≤40mm,2-4pcs,spitting,color closely | φ≤60mm,spitting,color closely |
Pin knots | Singlespitting,overall color closely | Small,spitting color closelyallowed | Spitting,color closelyallowed Spitting color closelyallowed | Spitting color closelyallowed |
Side knots | Not allowed | Not allowed | Allowed nodrop,no cracking, not alloweddead knots | Allowed nodrop,no cracking, not allowed dead knots | Allowed nodrop,no cracking, not alloweddeadknots |
Holes | Not allowed | φ≤1mm,3-5pes,spitting,nocolor change | φ≤1mm,spitting,not color changed φ≤1mm,spitting,not color changed | φs1mm,spitting,not color changed |
Black Lines | Notallowed | Not allowed | 1*100mm,1-3lines,spitting 3*200mm,3-5lines,spitting if the surface can besanded allowed,oil if thesurfaxecan besandedallowed, not allowed oil not allowed | 3 ·200mm,3-5lines,spitting if thesurface can besandedallowed, oil not allowed |
Pollution | if the surfaxecan be sandedallowed, oil not allowed | if thesurface can besandedallowed,oilnot allowed |
Splits | Not allowed | Not allowed | 3*300mm,1-2lines,seamsnot allowed 5*300mm,1-2lines,seamsnot alowed | 8*600mm,1-3lines,seams not allowed Allowed color closely,but the widths1/4 of flooring width,sq.m≤5% Allow onlyoneside,thewidth≤30%of flooring width |
End Oxidation | Not allowed | Not allowed | Allowed aslght,but thecolor closely | Allowed color closely,but thewidth≤1/4 of flooring width,sq.ms5% |
Subwood | Not allowed | Allowed aslght | Allow onlyoneside,thewidth≤20%of Allow onlyoneside,thewidth≤15%of flooring width |
colordifference Discoloration | Not allowed Not allowed | Not allowed | Allowed slight naturaldiscoloration,not allowed blue/yellow stainedfungus | Allowed slightnaturaldiscoloration,not allowedblue/yellow sainedfungus | Allowed slight naturaldiscoloration, notallowed blue/yellowstained fungus |
BarkPocket | Not allowed | Notallowed | 2*30mm,1 line 4*40mm,3lines | 5*60mm,3lines |
Watermark, spacer mark | Not allowed | Not allowed | Not allowed | Notallowed | Not allowed |
Decay | Not allowed | Not allowed | Not allowed Not allowed | Not allowed |
Broken grain | Not allowed | Notallowed | Not allowed Not allowed Not allowed |
Tabbygrain Not allowed | Not allowed | Allowedstrip,not allowedflake Allowed strip,not allowedflake Allowed strip,not allowedflake |